Hacker News stories for 7 PM on Friday Dec 28, 2012

0.696 It’s “locking” if it’s blocking comments

0.498 Facebook’s dark matter: “secret” groups comments

0.443 Bram Cohen: I have a question for the version control experts comments

0.427 Games industry predictions for 2013 comments

0.052 ReelSurfer: Timeline zoom, integrated video search comments

0.043 Show HN: UUID as a Service comments